EP2989653B1 - Schaltgerät mit verbesserter auslösemechanik im kurzschlussfall - Google Patents

Schaltgerät mit verbesserter auslösemechanik im kurzschlussfall Download PDF

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Publication number
EP2989653B1
EP2989653B1 EP13765677.3A EP13765677A EP2989653B1 EP 2989653 B1 EP2989653 B1 EP 2989653B1 EP 13765677 A EP13765677 A EP 13765677A EP 2989653 B1 EP2989653 B1 EP 2989653B1
Authority
EP
European Patent Office
Prior art keywords
switching
switching device
movable contact
bridge
quenching chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13765677.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2989653A1 (de
Inventor
Martin Steinbauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2989653A1 publication Critical patent/EP2989653A1/de
Application granted granted Critical
Publication of EP2989653B1 publication Critical patent/EP2989653B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H2071/0292—Housing or frames containing grooves or slots for guiding movable parts

Definitions

  • the invention relates to a switching device with an arc-quenching chamber, in which a contact arrangement of a fixed and a movable contact piece is arranged, wherein the movable contact piece is guided in a contact slide.
  • Switching devices serve, among other things, the safe switching off in the event of a short circuit and thus protect consumers and systems. Furthermore, electrical or mechanical switching devices are suitable for the operational manual switching of consumers as well as for the safe separation of a system from the power network during maintenance work or changes in the system. Electrical switching units are often operated electromagnetically.
  • switching units are high-quality electrical switching devices with integrated protection for motors, lines, transformers and generators. They are used at workstations with a lower switching frequency. Such switching units are suitable in addition to the short circuit protection for overload protection.
  • switching units have a contact slide unit with a contact slide and a movable contact piece.
  • the movable contact piece also has electrical contacts.
  • switching units have first contacts to a power line. In an on state, the electrical contacts of the movable contact piece contact the fixed contacts of the switching unit. In the event of a short circuit, the electrical contacts of the movable contact piece are released from the fixed contacts, so that the flow of current is interrupted. Here, the movable contact is released from the fixed contacts.
  • Known contact slides of switching units often have two guide systems, an inner and an outer guide system.
  • the outer guide system is used when the switching operation, that is, the switching on or off, via a switching mechanism of the switching unit. This does not create a bridge twister.
  • the inner guide system is used in the event of a short circuit, when the switching operation via a switching armature, often a plunger in conjunction with a guide pin, the switching unit takes place. That is, when switching off due to a short circuit, the movable contact piece along the inner guide system leads the contact slide ahead, bounces off impact surfaces in the so-called lower part of the switching unit and flies back along the inner guide system. Here it flies the switching anchor or the guide pin of the switching unit counter.
  • the DE 195 40 972 A1 discloses a current limiting dual disconnect contact system for low voltage circuit breaker.
  • electrodynamic opening of the contact system as a result of a very high short-circuit current is provided here that in the meantime the contact bridge is prevented by a first locking means on a return movement within a percussion end formed as a striking fork and the electromagnetically accelerated striker by second locking means on a release of a spring-mounted clamping ring ,
  • the contact bridge is released again from the first locking means, and by the accelerated as a result of the subsequent release bridge holder the striking fork is released from the connection with the second locking means.
  • this object is achieved by a switching device with an arc-quenching chamber, in which a contact arrangement of a fixed and a movable contact piece is arranged, wherein the movable contact piece is guided in a contact slide.
  • the invention is characterized in that the movable contact piece is guided by centering bevels on the housing walls of the arc-quenching chamber in the case of triggering.
  • centering bevels which molded on the lower part walls of the switching chamber of the circuit breaker will solve the above problems.
  • the bridge is spun down by the loop and current forces, it is aligned by the centering slopes and impacts centrally on both impact domes. An eccentric impact is thus no longer possible and tilting of the bridge is avoided.
  • the bridge is centered by Zentrierschrägen in the lower reversal point of the movement.
  • the bridge is in its off position relatively exactly in the middle of the switching chamber, whereby it is sufficiently far away from both switching chamber walls.
  • the bridge has enough distance to Plastic wall to ensure that burning the bridge into the base is avoided.
  • the centering bevels are made in one piece with the housing walls of the arc-quenching chamber. That is, the centering bevels are formed together with the housing walls of the arc-quenching chamber in a process step by a spray technique. Thus, no additional part must be made, but only the housing wall of the arc-quenching chamber can be specially shaped.
  • the centering bevels are made of plastic. This results in that the centering bevels can be manufactured together with the housing walls of the arc-quenching chamber in a process step in the form of an injection molding process.
  • a second set of centering bevels on one arranged second housing wall of the arc-quenching chamber opposite to the first set of centering bevels on a first housing wall of the arc-quenching chamber, a second set of centering bevels on one arranged second housing wall of the arc-quenching chamber, so that the movable contact piece is positioned between two Zentrierschrägen enginesn.
  • This arrangement according to the invention also contributes to the fact that the moving contact piece is guided uniformly.
  • centering bevels are arranged laterally next to the contact slide, so that the movable contact pieces are reliably guided in the event of tripping.
  • the switching device is preferably a circuit breaker.
  • the switching device has an arc-quenching chamber, in which a contact slide is arranged, in which a movable contact piece is guided. Laterally next to the movable contact piece both right and left, arc splitter stacks are arranged, which are formed of parallel superposed extinguishing plates.
  • centering bevels are arranged in the region of the movable contact piece.
  • These Zentrierschrägen are preferably made in one piece with the housing wall of the arc-quenching chamber, that is, the Zentrierschrägen are not formed as an additional part of the housing, but are injected within a process step together with the housing. Therefore, the centering bevels are preferably also made of plastic.
  • the centering bevels according to the invention are arranged on the housing wall of the arc-extinguishing chamber parallel to each other and spaced from each other.
  • a second set of centering bevels are arranged against a first set of centering bevels on the housing wall of the arc extinguishing chamber on a second housing wall of the arc extinguishing chamber, so that the movable contact piece is positioned between two centering bevel sets.
  • centering bevels according to the invention are preferably arranged laterally next to the contact slide, ie to the right and left of the contact slide.
  • the switching device presented here in particular the circuit breaker, with high switching capacity, is characterized in that less space is available for the bridge guide to always align the bridge centered in the chamber. Due to the increased forces that spin up the bridge in the event of a short circuit and by an optionally eccentric position of the bridge, it can lead to jamming of Bridge come in the lower part, whereby the device can not be turned on.
  • the bridge By means of the centering bevels according to the invention presented here, the bridge always hits the impact domes symmetrically and jamming is avoided. It also adds that the bridge is centered by the centering bevels according to the invention during a movement sequence, whereby it always has a sufficient distance to the chamber walls in their off position. Thus, a melting is excluded in the switching chamber.
  • Fig. 1 shows a section of a switching device, in particular a circuit breaker with an arc-quenching chamber 1, in which a contact slide 2 is arranged, in which a movable contact piece 3 is guided. Laterally next to the movable contact piece 3 both right and left, arc splitter packages 4 are arranged, which are formed of parallel stacked quenching plates. At a housing 5 of the arc-quenching chamber 1 3 centering bevels 7 are arranged in the region of the movable contact piece.
  • centering bevels 7 are preferably made in one piece with the housing wall 5 of the arc-quenching chamber, that is, the centering bevels 7 are not formed as an additional part of the housing 5, but are injected within a process step together with the housing wall 5. Therefore, the centering bevels 7 are preferably made of plastic. Preferably, the centering bevels 7 according to the invention are arranged on the housing wall 5 of the arc-extinguishing chamber 1 parallel to one another and spaced from each other.
  • a second set of centering bevels 7 are arranged on a second housing wall of the arc quenching chamber 1, so that the movable contact piece 3 is positioned between two centering bevel sets.
  • the centering bevels 7 according to the invention are preferably arranged laterally next to the contact slide 2, that is to say on the right and left of the contact slide 2.
  • Fig. 2 is the area around the contact slide 2, so the area left and right of the contact slide 2 shown. From the Fig. 2 the positioning of the centering bevels 7 according to the invention, which are arranged on the left and right of the contact slide 2, emerges.
  • Fig. 3 shows the two regions of the centering bevels 7 according to the invention in cross-section from the side.
  • the movable contact piece 3 is initially taken by the centering bevel 7 in the case of triggering and then encounters impact currents 8.
  • Fig. 4 goes the position of the movable contact in the on state.
  • Fig. 5 shows the position of the movable contact 3 in the tripped state during a short circuit.
  • the bridge By means of the centering bevels according to the invention presented here, the bridge always hits the impact domes symmetrically and jamming is avoided. It also adds that the bridge is centered by the centering bevels according to the invention during a movement sequence, whereby it always has a sufficient distance to the chamber walls in their off position. Thus, a melting is excluded in the switching chamber.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Manufacture Of Switches (AREA)
  • Circuit Breakers (AREA)
  • Slide Switches (AREA)
EP13765677.3A 2013-09-13 2013-09-13 Schaltgerät mit verbesserter auslösemechanik im kurzschlussfall Active EP2989653B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/068981 WO2015036029A1 (de) 2013-09-13 2013-09-13 Schaltgerät mit verbesserter auslösemechanik im kurzschlussfall

Publications (2)

Publication Number Publication Date
EP2989653A1 EP2989653A1 (de) 2016-03-02
EP2989653B1 true EP2989653B1 (de) 2017-05-31

Family

ID=49226138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765677.3A Active EP2989653B1 (de) 2013-09-13 2013-09-13 Schaltgerät mit verbesserter auslösemechanik im kurzschlussfall

Country Status (5)

Country Link
US (1) US9659726B2 (pt)
EP (1) EP2989653B1 (pt)
CN (1) CN105340041B (pt)
BR (1) BR112016002050B1 (pt)
WO (1) WO2015036029A1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067909B1 (de) * 2015-03-11 2017-10-18 Siemens Aktiengesellschaft Kontaktschiebereinheit für eine schalteinheit
CN210897140U (zh) * 2019-12-24 2020-06-30 施耐德电器工业公司 分断器和接触器
CN210956485U (zh) * 2019-12-24 2020-07-07 施耐德电器工业公司 分断器、分断器组件和接触器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3869757D1 (de) * 1987-12-25 1992-05-07 Maier & Cie C Ausloesesystem in einem installationseinbauschalter.
DE4441467C2 (de) * 1994-11-22 1997-02-27 Kloeckner Moeller Gmbh Kontaktsystem für ein elektromagnetisches Schaltgerät mit Schnellauslöser
DE19540972B4 (de) 1995-11-03 2005-05-04 Moeller Gmbh Strombegrenzendes Kontaktsystem mit Doppeltunterbrechung für Niederspannungs-Schutzschalter
DE19935661A1 (de) * 1999-07-29 2001-02-01 Abb Patent Gmbh Schaltkontaktanordnung für einen Leistungsschalter
DE19943965A1 (de) * 1999-09-14 2001-03-15 Moeller Gmbh Niederspannungsschaltgerät
JP4395023B2 (ja) * 2003-11-04 2010-01-06 三菱電機株式会社 回路遮断器
DE10356271B4 (de) * 2003-11-28 2008-02-14 Siemens Ag Schaltgerät
DE102007054426B4 (de) 2006-11-24 2010-08-05 Abb Ag Schaltkammer-Baugruppe und Schaltgerät
DE102008004747B3 (de) * 2008-01-16 2009-08-27 R. Stahl Schaltgeräte GmbH Paketnockenschalter
KR101004465B1 (ko) * 2008-09-05 2010-12-31 엘에스산전 주식회사 계전기
KR101086907B1 (ko) * 2010-10-15 2011-11-25 엘에스산전 주식회사 계전기
JP5778989B2 (ja) * 2011-05-19 2015-09-16 富士電機機器制御株式会社 電磁接触器

Also Published As

Publication number Publication date
US9659726B2 (en) 2017-05-23
WO2015036029A1 (de) 2015-03-19
BR112016002050A2 (pt) 2017-08-01
BR112016002050B1 (pt) 2021-08-17
US20160203926A1 (en) 2016-07-14
EP2989653A1 (de) 2016-03-02
CN105340041B (zh) 2017-07-07
CN105340041A (zh) 2016-02-17

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